(logic) A formula in the language of an axiomatic system, in which one or more schematic variables appear, which stand for any term or subformula of the system, which may or may not be required to satisfy certain conditions.

(logic) A variable that appears in an axiom schema and ranges over formulas, distinguished from the variables of the axiom schema that are quantified over and that range over the individuals of the universe of discourse.

You learn something new every day.

To substantially control a school administratively, financially, or in terms of its curriculum.

The pattern created by the rhymes at the ends of the lines of a stanza of poetry

Alternative form of afterschool

Alternative form of snorkel

To use a snorkel.

(uncountable) Any body of publications purported to be scholarly or supported by critical scholarship but which fails to comply with scholarly standards

Alternative spelling of schoolbook